Interactive Grid Parity Map for Solar Energy - United States

Latest Data:

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What is grid parity? Click to learn.
Grid parity, also called socket parity, is a measurement that compares the levelized cost of solar electricity with the cost of residential retail electricity. When grid parity is reached, it becomes more economical for you to install solar panels on your roof rather than purchasing power from your utility company. Read more here.
Click to read about our methodology.
Analysis assumptions:
  • Solar electricity estimates are determined using solar radiation values for state capitals.
  • Solar generation figures are based on an average-sized residential solar PV system of 5 kW that is operational for 25 years.
  • Default installation cost is estimated to be $3/watt (not including the 30% federal tax credit). This figure is based on an NREL study published in September 2017.
  • Where available, state-based solar tax credits were also included in the levelized cost calculations (other incentives, such as performance payments or property tax exemptions, are not included).
  • Utility rates are based on the monthly residential rate data set as reported by the EIA.
  • Utility rates are computed using the last 12 available months in the dataset.
  • Solar savings per kWh >5 ¢ 4 ¢ 3 ¢ 2 ¢ 1 ¢ 0 ¢ -1 ¢ -2 ¢ -3 ¢ -4 ¢ <-5 ¢Solar deficit per kWh

    Cost of Residential Solar Power

    $3 per Watt

    Investment Tax Credit

    Cost of an averaged sized (5kW) residential solar energy system


    Click on your state to get more details and see if solar power is right for you.

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